If you decide to transfer a domain from one domain registrar to another, you’ll need to pass through several security procedures. One of them is getting a special EPP code from the present registrar – as long as you are the domain registrant, since the code is emailed to the owner's email and no one else can get it. You’ll have to provide this code to the new domain name registrar, otherwise they will not be able to initiate the domain name transfer. The EPP authentication codes are case-sensitive and may comprise of digits or special symbols such as dots or commas, which can be easily miswritten, so make sure you copy & paste the correct code. As an additional protection measure, the transfer code for a domain may be altered on a regular basis. Certain domain name registrars refer to this code as a domain secret, a domain password or an Auth key as well.